Fluorine separator or water separator for central air conditioning? This is the measured data

When buying a central air conditioner, it is estimated that choosing a fluorine machine or a water machine is the first problem in front of the decoration white. You can also refer to the comparison between online fluorine machine and water machine.

When you meet a salesperson who sells fluorine machines, you may say, "fluorine machines are easy to use and cool quickly!" " This is actually quite in line with most people's evaluation criteria for air conditioning. The sales of water vending machines may retort: "The water vending machine is very comfortable and the air outlet is very soft. All five-star hotels use automatic water vending machines instead of fluorine machines. "

Both sides are right, but both are one-sided. Well, I can touch my conscience and say, "This paper will give you the most grounded choice suggestions based on the most objective measured data and my intuitive feelings of many years of experience."

Why can I make this evaluation? Because I not only made a water fluoride machine, but also installed a water fluoride machine in the same space of my exhibition hall. In this way, the data I measured is relatively meaningful.

1. Evaluation content: In the summer cooling mode, the surface cooler temperature and outlet air temperature of three different types of air-conditioned indoor units were collected, and the results were comprehensively evaluated from the perspective of human comfort.

Second, the evaluation of air conditioning unit information and working condition setting:

1. mcdowell air source frequency conversion household water dispenser (external machine) special indoor machine for residence (internal machine)

2. Daikin VRV residential gold full-effect P series (external machine), conventional indoor machine (internal machine), temperature and humidity balance indoor machine (internal machine)

(Among them, Daikin's temperature and humidity balance indoor unit is a new indoor unit promoted by Daikin brand in recent years, which needs to be used together with P series outdoor units. So accurately, my evaluation should be: water machine VS conventional fluorine machine, water machine VS temperature and humidity balance internal fluorine machine. )

Because the water temperature of the water dispenser can be adjusted, I set the outlet water temperature to 1 1℃ (generally, the lowest outlet water temperature can be set to 5℃ and the highest is 18℃ in summer, and the lower the temperature, the better the refrigeration effect and the higher the energy consumption).

Below are the panel temperature settings of three internal machines, all set at 25℃. As you can see, I chose the "refreshing" mode for the temperature and humidity balance internal machine, which is unique to this internal machine and also has the "cooling" mode. If I choose the cooling mode, it is no different from the conventional internal machine, so in order to increase the comprehensiveness of the evaluation, I choose the "refreshing" mode.

You may need to know what a "surface cooler" is first. The following is a schematic diagram of the structure of the air-conditioning indoor unit (picture from the network).

Whether it is a water machine or a fluorine machine, the structure of the indoor machine is similar, and these parts are indispensable in the picture. Water flows in the surface cooler of the indoor unit of the water machine, and the fluorine machine is a refrigerant (refrigerant). The basic principle is that the wind wheel rotates to suck in indoor air, blows it to the surface cooler for heat exchange, and takes away the heat in the air to send out cold air, so as to reduce the indoor temperature circularly. Measuring the temperature of the "surface cooler" can mainly judge whether the air conditioner is running normally, especially the water machine. Because of pipeline loss, when the chilled water of outdoor unit reaches the surface cooler of indoor unit in summer, there is generally a temperature difference of 1-3℃, which is too large, indicating that there may be a problem with the system.

Third, the measured data statistics:

A) The following figure shows the data of surface cooler temperature and tuyere air supply temperature of water chillers:

Analysis: The outdoor water temperature is set to 1 1℃, and the temperature difference between the indoor surface cooler and 12.8℃ is within a reasonable range. The temperature difference between the surface cooler and the final air supply temperature is generally 6-8℃, and the measured air temperature is 19. 1. These are the criteria for judging whether the air conditioner is operating normally. The above data shows that the air conditioner of this water machine is operating normally.

B) The following figure shows the data of surface cooler temperature and tuyere air supply temperature of conventional indoor unit of fluorine machine:

Analysis: The temperature difference between surface cooler and air supply is also within a reasonable range, but the air supply temperature of fluorine machine is 5℃ worse than that of water machine, that is to say, the same indoor temperature is set at 25℃, and the air temperature blown out of the two machines is different.

C) The following figure shows the data of surface cooler temperature and tuyere air supply temperature in the temperature and humidity balance of fluorine machine:

Analysis: You may find it strange to see this set of data. How can the supply air temperature be lower than the surface cooler temperature? The main reason is that it has one more surface cooler than the traditional indoor unit. Let me explain. It should be the same as the traditional indoor machine. The hot air was cooled to 14℃ by the surface cooler at 7.8℃, and now it is blown out after exchanging heat with another surface cooler at 36.9℃, so that the original air at 14℃ is finally heated to 23.3℃. The following figure is a simple schematic diagram of the temperature and humidity balance internal machine:

Fourth, data summary and comprehensive evaluation:

Combined with the data obtained, let's go back to the beginning and see what the salesperson said. The sales of fluorine machines say that fluorine machines are easy to use. The air outlet temperature in the above table is indeed the lowest. The lower the temperature, the faster the refrigeration and the better the effect. But from another point of view, the temperature is too low to be comfortable. It's easy to catch a cold when the temperature is so low for a while. Therefore, the sales of fluorine machines only emphasize the refrigeration effect, but ignore the comfort of refrigeration.

The sales of drinking fountains say that the comfort of drinking fountains is good. The outlet temperature of the external machine is 1 1℃, and the outlet temperature of the internal machine can reach 19℃. If the outlet temperature of the external machine is adjusted to 16℃, the outlet temperature of the internal machine can reach 23℃ (please see another article I wrote, "Huangmeitian, do you have to buy a dehumidifier?" ), the wind temperature around 20℃ gives people a relatively comfortable sense of body, which is cool wind, not cold wind. Therefore, because the water temperature can be adjusted, the water dispenser can meet the refrigeration effect of different needs, and the overall comfort is definitely better than that of the fluorine machine, so is the sales of the water dispenser. However, it is one-sided to say that five-star hotels only use water dispensers because of comfort. The real situation is that fluorine machine is not suitable for large buildings because of its small single machine capacity and limited pipeline length. In addition, there are restrictions on the amount of chemicals per square space in the decoration standards of five-star hotels, and the refrigerant flowing in the fluorine machine pipeline belongs to chemicals.

Let's take a look at the internal machine of temperature and humidity balance of fluorine machine. The "fresh" mode is actually a "dehumidification" mode. After passing through the first surface cooler, the hot and humid air is cooled, condensed and dehumidified, and then the air temperature rises and is sent out through the reheat exhaust pipe, thus achieving the effect of "dehumidification without refrigeration".

Fifth, the most grounded choice suggestion is coming:

1. People who are afraid of heat and like to feel cool as soon as they enter the air-conditioned room (young people/thin people who sweat a lot)-fluorine separator conventional internal machine.

2. People (old people, children, patients with rheumatoid arthritis) who are sensitive to cold air, easy to catch cold and catch cold, like the temperature not too low, but feel dry (relative humidity is 45-55%)-there is a temperature and humidity balancer inside the fluorine separator.

3. The water separator in the middle.

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